Composition to be added to cement mixings for cold glazes or the like



Patented Dec. 18, 1928.

UNITED STATES.

PATENT OFFICE.

JOHN LANG-DEIN, OF HAMBURG, GERMANY.

COMPOSITION TO BE ADDED TO CEMENT MIXINGS FOR GOLD- GLAZES OR THE LIKE.

No Drawing. Application filed May 20, 1925, Serial No. 31,707, and in France February, 1925.

Gildings on cement not sufliciently set and not yet two years old, on artificial stones,

or on cement'cold-glazes, which exude a1! thereon. Said glazes do -not possess sufieient constancy of volume for their being gilded and show, moreover, deep cracks espccially when the glaze is heated. Hitherto,

no addition has become known by which constancy of volume is given to the glaze.

' The glazes, furthermore, do not get sufficiently hard. Allthese inconveniences are overcome by the present invention.

The object of-my invention is the production of a composition for improving coldglazes on cement or concrete in such a way that they are made capable of being reliably gilded.

My composition consists of a mixture of polymerized linseed oils, ammoniacal water, lime Water, and infusorial earth, to which in one case bariumor strontium-oxide, and in. another case chromates, can be added.

Said mixture is added. to the conventional cement mixings, which are to serve as coldthe quantity of dry cement employed.

Polymerized linseed oil remains unaltered in the cement and preserves its drying ca-' being, by its polymerization, prevented from I saponifying with the alkalis.

glazes, in a proportion of about 1:3 of

The lime water forms the binding liquid of the mixture. Infuso'rial earth imparts to the glaze produced. a high constancy of volume and makes the same plastic, whereby it can be applied with a brush or. spattle.

Bariumor strontium-oxide increases the gloss of the glaze produced.

Chromates make the glaze very hard.

'In preparing the mixture, I prefer to use the ingredients in about the following proportions, viz.: 250 parts by weight of polymerized linseed-oil, 660 parts by weight of ammoniacal water, 5750 parts by weight of lime water, 1000 parts by weightof infusorialearth, and, if required, 400 parts by weight of barium or strontium-oxide, as well as 940 parts by Weight of chromates; together 9000 parts by weight.

Instead of linseed-oil, double the quantity of wood-oil can be used, while the infusorial earth can be replaced by double the quantity of molar earth, this being a natural earth found in-Denmark and consisting of infusorial earth, clay, andferi'ous oxide;

The infusorial earth, or molar earth, may be admixed with asbestos.

' To gild the cold-glazes produced with the improved mixture, the same are first coated with artificial resin solutions of" brown kind, whereupon the gilding is applied n the conventional manner.

What I claim, is: I I

A composition of. matter comprising a mixture of polymerized linseed oil, ammoniacal water, milk of lime, and infusorial earth in the proportions of 250:66Oz5750:

1000 parts by weight respectively, for the purpose set forth.

In testimony whereof I have hereunto set my hand.

' JOHN LANGBEIN. 

